Lock.



E. L. WILLIAMS.

LOCK.

APPLICATION FILED MAR.27, 1913.

Patented July 28, 1914.

2 SHEETS-SHEET l.

B. L. WILLIAMS.

LOOK.

APPLICATION FILED MAR.27,1913.

Patented July 28,1914.

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STATES PATENT OFFICE.

.L. WILLIAMS, or sAN'rA cnuz, CALIFORNIA, ASSIQKOB or ONE-H LF 'ro AmosA. wrcxorr, or SANTA cnuz, cALII'oBNIA' LOCK.

Specification of Letters Patent.

Application filed larch 27, 1913. I -Seria1No. 757,087.

Patented J lily 28, 1914.

are (commonly known as coin-operated locks' and such as are particularlyadapted for use in connection with lockers, cabinets, and the like.

.The primary object of the present invention is the provision of .a lockof this general character which, when in unlocked position, will preventwithdrawal of the key, which can be locked only through theinstrumentalit of a coin, or the like. which when once loc ed. cannot beagain unlocked untilthe key has been withdrawn and subsequentlyinserted, which, when in locked position, will preclude the insertion ofa coin in the slot, which shall be so constructed that the various partscannot be moved or tampered with "from the outside and which shall besimple in constructron, cheap to manufacture ,and reliable inoperation.

Other objects and many'of the attendant advantages will be readilyunderstood by those skilled in the art as the invention is fullycomprehended after reference to the following description whenconsidered In connection with the accompanying drawings throughout thevarious views of which like reference characters refer to similar parts.

On -the drawings-Figure 1 is a front elevation of a lock embodying 'myinvention, :a.

portion of the frame-work being broken away to show the relation ofvarious parts; 2 is a back view of the lock shown, in Fig. 1; Fig. 3 isa longitudinal sectional view taken substantially on the line 3--3 ofFig. 1; Fi 4 is a transverse sectional view taken on t e line 4--4 ofFig. 3; Fig. 5 is a similar {view showing the position of the parts asthe key is being withdrawn; Fig. 6

is a fr entary side view of the lock with the key partially withdrawn asshown in :5; and Fig. 7 is a fragmentary front view of the lock frameshowing the means for closing the coin aperture.

Referring to the drawings-reference character 11 indicates the lock bodyor frame provided at its edges with outstanding flanges 12 and 13 havingslots-formed therein to sup rt and guide the locking bolt 14'. This oltas shown in Figs. 1 and 3 is provided on its front face with a coingroove 15 which, when thebolt is in unlocked position, is disposed inalinement with a coin slot 16 formed by a channelshaped slide 17 securedby clips 18 or other fastening means to the frame 11. The front of theframe is provided with a coin-receivlng aperture 19 through which coinisin.- serted into the slot 16 from which it drops upon the casingextensions 21 located -b'e-' neath the sliding bolt 14, (Fig. 1).

The bolt 14 is provided with a recess 22 forming. an abutment orshoulder 23 and the slide 17 has a projection or finger 24 adapted torest in the depression 22 in the path of movement of the shoulder-23, sothat when the parts are in the position shown in Fig. 2 locking movementof the bolt toward the right is precluded by engagement of the shoulder23 with the projection 24. A spring 25 secured by a screw 26, or othermeans, to the flange 13 overlies a .pin'27 projecting from the rear faceof the slide 17 and normally urges the projection 24 into the recess 22.Itwill be manifest, therefore, that when the lock is in unlockedposition the slide 17 holds the looking bolt.

at its extremity which projects throughan aperture 33 in the lockingbolt across 'the coin passage 15, as shown in Fig. 1. The slide 17 isprovided with a shoulder 34 projecting into the coin passage 15 ata-point above the center of a coin 35 of predetermined size when saidcoin is resting upon the extension 21 of the casing 29. If now thekey-cylinder is rotated in a counterclockwise direction, viewing Fig. 1,or in a clockwise direction, viewing Fig. 2,'the coin 35- having beenpreviously inserted into the lock through the coin aperture 19, the'pin32 will engage the coin adjacent the bottom thereof, thereby forcing thecoin against the shoulder 34 and, since the shoulder engages the" coinconsiderably above its center, the slide will be forced upwardly throughthe instrumentality of the coin thereby permitting; the bolt to movetoward locked position. When the coin has traveled off from theextension v21 it drops into a slot 34-which diroots-it to anyconveniently located receptacle-or coin box. It will be manifest fromthe foregoing that the locking bolt is normally retained in unlockedposition by the slide but when a coin is inserted in the lock this coinserves as an operating element to lift-the slide and release the lockingbolt, thereby permitting the lock to be operated. The locking movementof the 'bolt is limited by .engagement of the stop 20 with the flange13.

It will be observed from Fig. 3 that the rear wall of the slide 17 g isdisposed opposite the coin-receiving'aperture 18 when the lock is inunlocked position'and, in order to prevent tampering with the lock, suchas,

lifting of the slide by the-insertion of a sharpeinstrument through thecoin aperture 19, I have provided mechanism which preeludes withdrawalof the slide from in front of'the shoulder 23 except upon an initialmovement of the locking bolt toward locked position. One suitable formof mechanism for this purpose consists in a dog 36 pivotally mounted at37 on the main frame 11 andhaving one end overlying'a shoulder orledge-r38 formed integrally with or attached to. one edge of the slide17. The other end of the dogengages in a depression or notch 39. formedin the locking bolt 14 so that any movement of the bolt will swing thelatch oniits pivot. When the bolt is in unlocked position as shown inFigs. 1 and 2, the dog 18 'disposed over' the ledge 38 and precludeslifting of the .slide out of" operative relation tothe bolt. The variousparts of the lock are so proportioned that there isa slight amount oflost motion between the pin 32 and the shoulder 34, or, in other words,the pin 32 must move a short distance carrying with it the bolt 14before the coin 35 will raise the slide 17. This initial movement of thebolt is sufficient to rock-the dog 36 on its-pivot and partially elevatethe overhanggnogtend away from the ledge 38. As the continues to-mowethe overhanging end of the dog is withdrawn from the path of the ledge38 faster than the slide is raised by the coin 35, so that the slide maybe elevated into inoperative position without interference by the dog.When the bolt has been moved to locked position the finger or projection24 of the slide rests upon the .top of the bolt between the recess 22and the depression or recess 39. For the purpose of preventing theinsertion of a coin in the lock when the parts are in locked position, Ihave mounted a bar 41 across the front of the slide 17 so that when theparts are in locked position this bar is disposed over the aperture 19completely closing-the same as shown in Fig. 7. If preferred, the barmaybe provided with the word Locked to indicate that the locker cannotbe used.

When the parts are in unlocked position the key-cylinder assumes theinclined position shown in Figs. 3 and 4 and the key 42 cannot beremoved from the lock. As has previously been explained, the lock canthen only be moved to locked position after a coin of the proper sizehas been inserted in the coin slot. My invention also provides means forpositively preventing rotation of the key-cylinder after the bolt hasbeen thrown to locked position, which means can only be released bywithdrawal and subsequent insertion of the key in the lock, theconstruction therebybeing adapted to obviate anypossibility ofaccidental unlocking of the lock. The mechanism for this purposecomprises a latch 43 disposed in a groove 44 of the cylinder casing 29and extending substantially parallel with and along one side of thekey-cylinder 28. The outer end of the latch isprovided with anoverhanging lip or lug 45 adapted to engage in a depression or notch 46formed in the end of the cylinder 28 at the bottom of the key slot. Uponrotation of the key-cylinder to locked position the notch is moved intoalinement with the lip 45 which is engaged with the notch by a coiledexpansion spring 47 interposed between a heel 48 projecting downwardlyfrom the inner end of the latch and a screw49 threaded into an openingin the casing through which the spr ng is introduced. The .inner end ofthe latch is also provided with an upwardly extendin inclined toe 51adapted to be engaged y a projection 52 formed on the lower edge of thekey 42, so that when the key is inserted engagement of the projection 52with the toe 51 will force the latch longitudinally inwardly-to releasethe lug 45 from the notch 46 in the key-cylinder. When the key is turnedfrom locked to unlocked position, or from the position shownin Fig. 5 tothat shown in'Fig. 4, the projection '52 travels laterally away fromthetoe 51 and-the latch is; returned to normal position with the lip Inotch in the key cylinder as previously described and positivelyprecludes turning movement, of the cylinder. In order to unlook thecylinder it is necessary to withdraw the key, Withdrawal beingvpermitted by reason of the inclined outer face and inclined inner faceof the projection 52 and the-toe 51, respectively, the latch assumingthe position shown in .Fig. .6 as .the key v 1s withdrawn and, uponsubsequent insertion,

of the key, the latch is disengaged from the cylinder as previouslydescribed. It will be understood, therefore. that I have provided alock, which, when in unlocked position, will prevent withdrawal of thekey, which can only be moved from unlocked to locked position upon theinsertion of a com and -which, when once looked, cannot be againunlocked until the key has'been withdrawn and again inserted in thelock. 1 My improved construction also precludes tam pering with the lookand prevents the insertion of a coin when the lock is locked.

It is believed that the construction and operation of the invention willbe fully un derstood from the foregoing without further description andit Wlll be manifest. that many variations in the structure disclosed maybe resorted to without departing from the spirit of the invention andwithout exceeding the scope of the appended claims.

I claim. 1

1. In a lock provided with a coin-receiving slot, the combination of abolt, key-actuated mechanism for operating said bolt,

means normally holding said bolt against locking movement, said meansbeing rendered inoperative by a coin. upon lnitial.

movement of said bolt, and a device operable by said bolt forpreventing; movement of said means until an initial movement of the bolthas been effected.

2. In a lock provided with a coin slot, the combination of a lockingbolt, key-actuated mechanism for operating said bolt, a slide normallypositioned to prevent movement of the bolt to locked position, saidslide beingadapted to be moved into inoperative position by a coindisposed in said slot upon initial locking movement of said bolt, and

means connected to said bolt and adapted to engage said slide forpreventing movement of the slide into inoperative position extept uponmovement of the bolt.

3. In a lock, the comblnation of a sliding bolt provided with ashoulder, a slide normally positioned in the path of said shoulder toprevent movement of. the bolt to locked position, and means for normallyholding said slide in operative posltion, said means being connectedwith said bolt whereby initial movement -OZE".'thlnbO1 t'P&lfia8eS themeans from the slide.

4. In a lock, the combination-of asliding bolt provided witha-shoulder,.- a slide movable transversely of-s'aid-bolt and having aportion thereof normally disposed in the path ofsaid shoulder to Yprevent movement of the bolt to locked position, andacpivotally mounteddog connected with .said boltand normally preventing movement of the*slide when the bolt is in 'unlockedposition, said -dog being .adapted.to he .rvithdnawnfrom operative relatlon to'the sllde upon lmtialmovement of the bolt.

5. In a'lock, the combination of a frame provided with a coin receivingaperture, a

sliding bolt, key actuated mechanism for operating'said bolt a slidearranged to prevent'movement oi the bolt from-unlocked to lockedposition, said slide being adapted to be released upon initial lockingmovement of said mechanism by a coin disposed between a portion of theslide and sald mechanism, and means carried by said slide for closingsaid aperture when the slide is at one end of its travel.

6. In av lock, the combination of a frame provided with an aperture, achannel-shaped slide forming a coin slot, a sliding bolt provided with atransverse passage disposed in alinement with said coin slot when thebolt is in unlocked position, said slide having a projection adapted tocooperate with a shoulder on the sliding bolt to hold said bolt inunlocked position, means for supporting a coin in said passagein thesliding bolt, a projection on the slide adapted to engage said coinabove its center, and key-actuated mechanism for movin said slidingbolt, said coin being adapte upon initial movement of the bolt to forcethe slide out of operative relation with 'res ect to said bolt.

7 In a lock, the com ination of a frame provided with a coin receivingaperture, a channel shaped slide'formin a 00111 slot adjacent to saidaperture, a loc ingbolt adapted tobe engaged by said slide whereby thebolt is held against locking movement,

means for normally holding sald slide in engagement with the bolt, saidmeans being connected with said bolt and adapted to be released from theslide upon initial locking movement of the bolt, means actuated throughthe medium of a coin inserted in said slot for moving the slide out ofoperative relation to the bolt upon initial locking movement of thebolt, and means carried by the slide to close said aperture whenthe boltis in locked position.

8. In a lock adapted to receive a coin, the combination of a lockingbolt, means for normally holdingsaid bolt in unlocked position, akey-actuated cylinder, an arm mounted on said cylinder for actuatingsaid bolt,

a latch for retaining said holding means in operative position withrespect to the bolt, and a closure carried by said holding means adaptedto prevent the insertion of a coin into the look when the locking boltis in locked position.

9. In alo ck provided with a coin-receivi lig slot, the combination of abolt, mechanism for operating bolt, means rendered 10 moperative uponinltlal movement of the bolt by a coin inserted in said slot and nor-EDWARD L. WILLIAMS.

Witnesses:

CHAS. H. WIDMAN, MARION HART.

